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Magnetic droplet so...
Magnetic droplet solitons in orthogonal spin valves
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- Chung, Sunjae (författare)
- Gothenburg University,Göteborgs universitet,KTH,Materialfysik, MF,University of Gothenburg, Sweden,Institutionen för fysik (GU),Department of Physics (GU)
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Majid Mohseni, S. (författare)
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- Eklund, Anders (författare)
- KTH,Integrerade komponenter och kretsar
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- Dürrenfeld, P. (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
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- Ranjbar, M. (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
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- Redjai Sani, Sohrab (författare)
- KTH,Material- och nanofysik
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- Nguyen, T. N. Anh (författare)
- KTH,Material- och nanofysik,Materialvetenskap,Vietnam Academy of Science and Technology, Viet Nam
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- Dumas, Randy K. (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
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- Åkerman, Johan (författare)
- Gothenburg University,Göteborgs universitet,KTH,Materialfysik, MF,University of Gothenburg, Sweden,Material- och nanofysik,Institutionen för fysik (GU),Department of Physics (GU)
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(creator_code:org_t)
- American Institute of Physics (AIP), 2015
- 2015
- Engelska.
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Ingår i: Fizika Nizkih Temperatur. - : American Institute of Physics (AIP). - 0132-6414 .- 1816-0328. ; 41:10, s. 833-837
- Relaterad länk:
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http://fnte.ilt.khar...
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http://dspace.nbuv.g...
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https://urn.kb.se/re...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://gup.ub.gu.se...
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Abstract
Ämnesord
Stäng
- We review the recent experimental advancements in the realization and understanding of magnetic droplet solitons generated by spin transfer torque in orthogonal nanocontact based spin torque nanooscillators (STNOs) fabricated on extended spin valves and spin valve nanowires. The magnetic droplets are detected and studied using the STNO microwave signal and its resistance, the latter both quasistatically and time-resolved. The droplet nucleation current is found to have a minimum at intermediate magnetic field strengths and the nature of the nucleation changes gradually from a single sharp step well above this field, mode-hopping around the minimum, and continuous at low fields. The mode-hopping and continuous transitions are ascribed to droplet drift instability and re-nucleation at different time scales, which is corroborated by time-resolved measurements. We argue that the use of tilted anisotropy fixed layers could reduce the nucleation current further, move the nucleation current minimum to lower fields, and potentially remove the need for an applied magnetic field altogether. Finally, evidence of an edge mode droplet in a nanowire is presented.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Nyckelord
- Magnetic droplet soliton
- Magnetoresistance
- Perpendicular anisotropy
- Spin torque
- Anisotropy
- Magnetic devices
- Magnetic fields
- Magnetism
- Nanowires
- Nucleation
- Solitons
- Applied magnetic fields
- Continuous transitions
- Magnetic droplets
- Magnetic field strengths
- Spin transfer torque
- Time resolved measurement
- Drops
- Magnetic droplet soliton
- Magnetoresistance
- Perpendicular anisotropy
- Spin torque
- Anisotropy
- Magnetic devices
- Magnetic fields
- Magnetism
- Nanowires
- Nucleation
- Solitons
- Applied magnetic fields
- Continuous transitions
- Magnetic droplets
- Magnetic field strengths
- Spin transfer torque
- Time resolved measurement
- Drops
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